Correlating Uncompensated Antiferromagnetic Moments and Exchange Coupling Interactions in Interface Ion-Beam Bombarded Co90Fe10/CoFe-Oxide Bilayers

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概要

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• The coercivity and exchange bias field of ferro-/antiferromagnetic Co90Fe10/CoFe-oxide bilayers were studied as function of the surface morphology of the bottom CoFe-oxide layer. The CoFe-oxide surface structure was varied systematically by low energy (0--70 V) Argon ion-beam bombardment before subsequent deposition of the Co90Fe10 layer. Transmission electron microscopy results showed that the bilayer consisted of hcp Co90Fe10 and rock-salt CoFe-oxide. At low temperatures, enhanced coercivities and exchange bias fields with increasing ion-beam bombardment energy were observed, which are attributed to defects and uncompensated moments created near the CoFe-oxide surface in increasing amounts with larger ion-beam bombardment energies. Magnetometry results also showed an increasing divergence of the low field temperature dependent magnetization [\Delta M(T)] between field-cooling and zero-field-cooling processes, and an increasing blocking temperature with increasing ion-beam bombardment energy.

• 2012-11-25

著者

• Lin Ko-wei

  Department Of Materials Engineering National Chung Hsing University

• Shueh Chin

  Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan

• Chen Pei-shi

  Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan

• Klose Frank

  Australian Nuclear Science and Technology Organisation, Kirrawee 2232, Australia

• Lierop Johan

  Department of Physics and Astronomy, University of Manitoba, Winnipeg, R3T2N2, Canada

• Cortie David

  Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong 2522, Australia

• Chen Wen-Chen

  Taiwan Spin Research Center, National Yunlin University of Science and Technology, Douliu 640, Taiwan

• Wu Te-Ho

  Taiwan Spin Research Center, National Yunlin University of Science and Technology, Douliu 640, Taiwan

• Lierop Johan

  Department of Physics and Astronomy, University of Manitoba, Winnipeg R3T 2N2, Canada

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• Tuning Microstructural and Magnetic Properties of Ion-Beam-Deposited Ni80Fe20/NixFe1-xO Composite Films
• Ion-Beam Bombarded SiO2 Layer Effects on the Microstructure and Magnetism in FePt/SiO2 Bilayers
• Correlating Uncompensated Antiferromagnetic Moments and Exchange Coupling Interactions in Interface Ion-Beam Bombarded Co90Fe10/CoFe-Oxide Bilayers
• Probing Exchange Bias Effects in CoO/Co Bilayers with Pillar-Like CoO Structures
• Antiferromagnetic Layer Structure Effects on Exchange Coupling Strength in Ion-Beam Deposited Ni80Fe20/Cobalt Oxide Bilayers
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